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A.always less than atmospheric pressure
B.always unity
C.an index of molecular position of gas
D.dimensionless
Which of the following is a boiler accessory?
A.Fusible plug
B.Water level indicator
C.Economiser
D.Stop valve
The mixing process of two fluids is always considered as
A.reversible
B.irreversible
C.reversible or irreversible depending upon the gases involved
In a boiler a fusible plug is located at the
A.bottom of fire tubes
B.bottom of drum
C.top of superheater
D.inlet to stop valve
For a closed system, the difference between the heat added to the system and the work done by the system is equal to the change in
A.enthalpy
B.entropy
C.temperature
D.internal energy
Which of the following valve is installed between the boiler and the feed pump?
A.Steam stop valve
B.Flow of cock
C.Feed check valve
D.Throttle valve
A jar contains a mixture of oxygen and hydrogen gas in the ratio 1 : 5. The ratio of mean knetic energies of hydrogen and oxygen molecules is
A.1 ; 1
B.1 ; 4
C.1 ; 5
D.1 ; 16